Yes. I am doing full duplex on the same frequency, transmitting from TX/RX and receiving on RX2 at the same time. When I put the antennas far way from each other, the received signal amplitude is very low. And when I change the distance between them, i found the received signal amplitude is kind of stable. So i think maybe the leakage takes the major. Am I right?
On Fri, Feb 8, 2013 at 4:26 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 02/08/2013 04:10 PM, gang li wrote: >> >> When the signal received on RF2 port has a very weak strength, the >> energy leaked from TX to RX will dominate in the total received >> energy. I have observed this in my experiments. Are there any ways to >> measure the leaked signal so i can compensate it? I am thinking a way >> of by connecting the RF1 and RF2 ports with a long cable and 60db >> attenuators. And then i record the received signal. I assume it is the >> leaked signal from TX. Are there any better ways? Thanks for your >> reply. >> >> Best, >> Gang > > Are you TX/RX on the same frequency, or different frequencies? > > The usual way to deal with this on different-frequency setups is to use a > duplexor, or a deep notch filter on the RX port, and probably boost your > antenna signal a bit with an external amplifier. > > But if this is *same-frequency* duplex, the on-board leakage is really minor > compared to the coupling between your antennae. > > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org > > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
